Rod-packing.



' ings UNITED STATES OFFICE.

OLIN J. (irARLOCK, OF PALMYRA, NEW YORK.

ROD-PACKING.

Specification of Letters Patent. a Application tiled October 11,1905. Serial No. 282.327.

Patented Apre 17, 190e.

Be it known that I, OLIN J. GAnLoeK, of Palmyra, in the county of Wayne and State of New York, have invented a new and useful improvement in Rod-Packing, which iinprovenient is Jfully set forth in t ie following specification and shown in the accompanying drawings.

My present invention-is a new and novel packing for piston-rods designed especially or use with steam-engines working under high pressure, this packing being known. and designated in the trade as hi h-pressuresteam packing." Rod-packing Aor this particular use and purpose is subjected to a higher degree of heat than packing generally and needs to be composed of materials and built up with reference te this use and for resisting vulcanization.

The packing herein shown and described is composed ei" materials and parts oi a nature and quality that enable it to withstand. the

action oi" high teiniieratures without deterioration or injiiry,tlie india-rubber portion be- -ing practically non-viileanizing, and

the asbestos employed in the make-up will not burn.

The packing is also constructed especially for this purpose and to attain thisobject rei"- erence being had to the accoinpan ying drawwhieli with the reference characters marked thereon 'iorin a part of this specification, the construction and process of manufacture being particularly pointed out in the ap ended claims.

ligure 1v drawn to an exaggerated scale is a transverse section of a rope of this acking. Fi 2 shows the packing as coile in a stulin r- )ox around a piston-rod, the body of pac ing being longitudinally sectioned through the axis of the rod. Fig. 3 is a side view of a portion of a ro e oi the packing, partly in axial section. Iii 4 shows in plan a portion ofthe rope with t ie external wrapper partially unwound.

ln the drawings, A, Fig. 3, portion of a rope of this limprove packing A', Fi fs. 1 and 3, is a core or center strand of loose iber, preferably asbestos, pure and unrnixed with other substances, cylindrical in form and B a iirni tubular wrap er or sheath of asbestos cloth braided upon he strand A 1n a manner to compress the free fibers ofthe strand.l C is a lat strip oi. pliable india-rubber of such quality as to resist vulcanization as perfectly as possible, it being substantially re resents a non-vulcanizing. This strip is preferably made rectangular in cross-section and laid flat aeaiist or upon one side ol" the braided sheath B, the adjacent surfaces ol the latter and the india-rubber strip being lirst coated orsineared with a liquid india-rubber cement. This )riniary body, consisting oi" the said strand or core A the wrapper or sheath B, and the rubber stri (l, is then subjected to lateral pressure to "irinly ross the said strip against the wrapper B ant. to give said body a form approximately rectangular in crosssection and left to harden under such pressure. Subsequently the outer wra per l) is wound upon the said. primary boo being passed twice around the body. 'iliis wrapper consists of braided asbestos cloth containing, preferably, in its make up a small amount et india-rubber and is placed upon the body biasing or with /the threads running in inclined directions, as appears in liig. 4. Previous to winding this outer wrapper upon the body the latter and said outer wrapper are covered or coated with cement to cause them to iirnily adhere, the final edge oi the wrapper meeting a side oi the body A. at a line c, *ig. 3. When the wrapper l) is thus put to place, the iinal body or rope A is again subjected to pressure or calendered between grooved rollers, which after again hardening completes the structure, the 'iinished rope then having the form of cross-section shown in Fig. 1, it being substantially rectangular with its opposite sides 0r faces 'l arallel. The rope thus formed is in `con( ition and ready to be worked up into spiral bodies or rings for acking rods, as stated, or it may be forme( into coils or other manner of necessary and desirable Fig. 2 oi the drawings shows rings or spirals of the packing as in a stalling-box around a piston-rod F, the rubber backing (l being distant from the rod or near the convex side oi" the body of' packing and in. position to by its elasticity ur fe the inner portion oi" the packing against t ie reciprocating rod.

The iibrous asbestos core ervoir for the lubricating-oil and. serves to gradually supply the cloth wrappers and i) with the saine. ihere is no cement employed between the asbestos yarn going to make up the primary wrapper or sheath B. When the core is run through the 'braider to have the wrap er formed upon it, both the yarn and the 'i1 er of the core are 1n a dry state',

ackino as ioiind h TOO A acts as a res- IIC What l claim as my invention, and desire to secure by Letters Patent, is

1. Packing for piston-rods, consistin vof a strand of loose ber, as asbestos, a tu ular wrapper of asbestos for said ber strand, and a strip of non-vulcanizing india-rubber parallel with the ber strand and in contact with said wrapper, and an outside wrapper for said parts.

2. Packing for piston-rods, consisting of a rope having a center strand of ber, and a tubular, braided asbestos sheath for said center strand, a at strip of non-vulcanizin india-rubber cemented to the sheath, anv anV outside wrap er wound u on and cemented to said sheath) and the in la-rubber strip.

3. The process of constructing a rope of packing, such as described, consisting in braiding a sheath upon a strand of ber, keeping said ber and sheath'in a dry state, adding to said sheath a strip of india-rubber with cement between, submitting the body thus formed to lateral pressure, allowing the same to harden under pressure, and applying an outer` Wrapper to the said compressed body .with cemented surfaces, and nally calendering the whole body to give it form approximately rectangular in cross-section.

in witness whereof I have hereunto set my hand, this 2d day of ctober, 1905, in the vpresence of two subscribing witnesses.

@LIN J. GARLOCK.

Witnesses:

F. W. GRIFFITH, J. H. L. GALLAGHER. 

